Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 201, NWS Rapid City, SD

July 23, 2012Custer County, Pennington County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 23, 2012, 9:47 PM MDT for Custer County, Pennington County, South Dakota. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 23, 2012, 9:47 PM MDT (03:47 UTC)
Expired: Jul 23, 2012, 10:45 PM MDT
In force: 58 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Custer County, SD, Pennington County, SD

The radar

The Rapid City radar (KUDX), 40 km from the middle of the area, began a volume at 03:48 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jul 23, 6:22 PM MDT, 3 hours 25 minutes before

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Local storm report, Jul 23, 6:39 PM MDT, 3 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
639 PM MDT MON JUL 23 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0627 PM     TSTM WND GST     7 SE MUD BUTTE          44.93N 102.77W
07/23/2012  E60 MPH          MEADE              SD   TRAINED SPOTTER

&&

POJORLIE

Local storm report, Jul 23, 7:32 PM MDT, 2 hours 15 minutes before

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Special weather statement, Jul 23, 8:09 PM MDT, 1 hour 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
809 PM MDT MON JUL 23 2012

SDZ027-041-240245-
FALL RIVER SD-SOUTHERN FOOT HILLS SD-
809 PM MDT MON JUL 23 2012

AT 806 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES WEST OF
PROVO TO 7 MILES NORTHEAST OF RUMFORD TO 11 MILES WEST OF SLIM
BUTTE...AND MOVING NORTHEAST AT 20 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH FREQUENT DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  EDGEMONT...
  OELRICHS...
  ANGOSTURA RESERVOIR...

&&

LAT...LON 4299 10405 4301 10406 4324 10407 4337 10389
      4332 10330 4326 10300 4299 10301
TIME...MOT...LOC 0209Z 239DEG 18KT 4321 10394 4320 10356
          4305 10303

JC

Special weather statement, Jul 23, 8:40 PM MDT, 1 hour 7 minutes before

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Local storm report, Jul 23, 9:07 PM MDT, 40 minutes before

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The office that day

Everything else NWS Rapid City, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 23, 6:22 PM MDT	Severe Thunderstorm Warning	UNR	Meade	38 min
Jul 23, 6:48 PM MDT	Severe Thunderstorm Warning	UNR	Meade	57 min
Jul 23, 7:40 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Ziebach	29 min
Jul 23, 8:09 PM MDT	Special Weather Statement	UNR	Fall River	36 min
Jul 23, 8:40 PM MDT	Special Weather Statement	UNR	Custer	50 min
Jul 23, 9:01 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	59 min
Jul 23, 11:12 PM MDT	Special Weather Statement	UNR	Haakon	33 min
Jul 23, 11:14 PM MDT	Special Weather Statement	UNR	Haakon	31 min
Jul 24, 2:13 PM MDT	Special Weather Statement	UNR	Pennington	47 min
Jul 24, 2:32 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	29 min
Jul 24, 4:02 PM MDT	Severe Thunderstorm Warning	UNR	Butte	58 min
Jul 24, 4:23 PM MDT	Special Weather Statement	UNR	Lawrence	37 min
Jul 24, 4:53 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Lawrence, Meade	31 min
Jul 24, 5:03 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	51 min
Jul 24, 5:43 PM MDT	Special Weather Statement	UNR	Butte	47 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.